Watching the Tree

“Once there was a boy who was told by his master to catch a hare. He went into the woods and looked around.
Lo and behold, he saw a hare running along at full speed.
As he watched in astonishment, the hare ran smack into a tree and knocked itself unconscious. All the boy had to do was to pick it up. For the rest of his life, the boy waited behind the same tree in the hope that more hares would do the same thing.”

The only thing that does not change is that everything changes.